National Security Office chief Chung Eui-yong, left, shakes hands with Chinese President Xi Jinping at the Great Hall of the People in Beijing, Monday. Chung visited Xi to deliver details of his meetings last week with North Korean leader Kim Jong-un and U.S. President Donald Trump. / Yonhap

By Kim Bo-eunSouth Korea is seeking cooperation from neighboring states in its bid to pave the way for the summit between North Korean leader Kim Jong-un and U.S. President Donald Trump by May.South Korean envoys who met with Kim and Trump last week are visiting heads of state in China and Japan to share details of the meetings. After returning from Washington, National Security Council chief Chung Eui-yong headed to Beijing on Monday and National Intelligence Service director Suh Hoon headed to Tokyo, after reporting details of their meeting with Trump to South Korean President Moon Jae-in. Chung met with Chinese President Xi Jinping in Beijing, Monday.Xi told Chung China supports Washington-Pyongyang dialogue, and wants to develop relations with South Korea "stably and healthily," according to Cheong Wa Dae.In a message delivered through Chung, Moon invited Xi to visit Seoul at an early date.Chung will head to Moscow on Tuesday. It is unclear whether he will be able to meet with Russian President Vladimir Putin, due to the upcoming presidential election on Sunday, in which Putin is running.Beijing and Moscow have welcomed Pyongyang's shift in stance. The two states also pledged to play a facilitating role in the inter-Korean summit.Meanwhile, Suh will meet with Japanese Prime Minister Shinzo Abe on Tuesday. He spoke with Foreign Minister Taro Kono after arriving in Tokyo a day earlier.Tokyo earlier attributed North Korea's peace overture to international sanctions on the nuclear state, and stressed the need to maintain maximum pressure.In a meeting with South Korean envoys on March 5, the North's Kim stated his willingness toward denuclearization in return for ensured security. He said the regime is willing to discuss the matter of denuclearization with the U.S. and that no provocations will be made during the period of dialogue. The meeting also concluded an inter-Korean summit will be held in April.Following the Pyongyang meeting, the envoys flew to Washington to report its outcome to the White House. President Trump accepted Kim's invitation for dialogue on Thursday, local time. The meeting is set to take place in late May, only months following hostile verbal exchanges between the leaders that raised fears of war.Attention is growing over whether six-party talks on North Korea's denuclearization will be resumed, as South Korea seeks to work closely with member states regarding recent developments.The talks among North and South Korea, the U.S., China, Japan and Russia began in 2003, and the last round was held in 2007. Pyongyang stated it would shut down its nuclear facilities, but in 2009, pulled out of the talks and resumed its nuclear program.

Moon is also reportedly considering holding telephone conversations with heads of state of the U.S., China, Japan and Russia."An invaluable opportunity to open a road to the denuclearization of the Korean Peninsula, lasting peace and co-prosperity has come forth," Moon said in a meeting with secretaries, Monday."There will be critical changes as summits between North and South Korea and the U.S. will take place in the next two months. But because what we aim to achieve, in the short time span of two months, is something the world has not succeeded in up until now, it is difficult to be optimistic about the results and we are taking caution in the process."